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Method of Determining Ambient Pressure for Fuel Injection

a fuel injection and ambient pressure technology, applied in the direction of electric control, machines/engines, instruments, etc., can solve the problems of adding cost and manufacturing complexity to a motor vehicle, and the related art does not teach provisions for adjusting the ambient pressure calculation

Inactive Publication Date: 2010-01-21
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]A method of determining ambient pressure for a fuel injection system is disclosed. The invention can be used in connection with a motor vehicle. The term “motor vehicle” as used throughout the specification and claims refers to any moving vehicle that is capable of carrying one or more human occupants and is powered by any form of energy. The term motor vehicle includes, but is not limited to cars, trucks, vans, minivans, SUVs, motorcycles, scooters, boats, personal watercraft, and aircraft.

Problems solved by technology

However, since such a sensor can add cost and manufacturing complexity for a motor vehicle, methods for determining ambient pressure without an ambient pressure sensor have also been proposed.
The related art does not teach provisions for adjusting calculations of ambient pressure as the operating conditions of the engine change over time due to wear and other factors.

Method used

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  • Method of Determining Ambient Pressure for Fuel Injection
  • Method of Determining Ambient Pressure for Fuel Injection
  • Method of Determining Ambient Pressure for Fuel Injection

Examples

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Embodiment Construction

[0048]FIG. 1 is a schematic view of an embodiment of motor vehicle 100. For purposes of illustration, motor vehicle 100 is shown as a sports utility vehicle; however it should be understood that in other embodiments motor vehicle 100 could be any type of motor vehicle including, but not limited to, cars, trucks, vans, minivans, SUVs, motorcycles, scooters, boats, personal watercraft, and aircraft.

[0049]Motor vehicle 100 includes engine 102. Engine 102 may be any type of engine that is capable of producing torque. In addition, motor vehicle 100 and engine 102 may be associated with other components that can assist in propelling motor vehicle 100. For clarity, only some components of motor vehicle 100 are shown in this schematic illustration. It should be understood that in other embodiments, additional components may be used with motor vehicle 100.

[0050]Engine 102 may be associated with one or more fuel injectors that are configured to deliver fuel to engine 102. In this embodiment, ...

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PUM

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Abstract

A method of controlling a motor vehicle is disclosed. The method can be used to determine an ambient pressure value without the use of an ambient pressure sensor. The ambient pressure value can be used for controlling a set of fuel injectors. The method can include provisions for adjusting the ambient pressure value to correct for errors introduced by engine wear and other factors.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to motor vehicles and in particular to a method of determining ambient pressure for a fuel injection system.[0003]2. Description of Related Art[0004]A fuel injector can include an ambient pressure sensor to measure the ambient pressure. However, since such a sensor can add cost and manufacturing complexity for a motor vehicle, methods for determining ambient pressure without an ambient pressure sensor have also been proposed.[0005]Kawano (U.S. Pat. No. 6,863,057) teaches a fuel vapor treatment system. The treatment system includes a fuel tank and a canister that are fluidly coupled together by a purge pipe. The canister is provided with an atmospheric release port that can be closed using a drain cut valve. Kawano also teaches an absolute pressure sensor that measures both the pressure inside the piping and the atmospheric pressure. Kawano teaches that a controller sets the pressure value d...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G01M15/00
CPCF02D33/003F02D41/0002F02D41/123G01M15/09F02D41/2451F02D2200/704F02M37/0082F02D41/22
Inventor ROBINSON, JAMES S.VANDERHOOF, JARED C.
Owner HONDA MOTOR CO LTD
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